Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP2)

SUSE Security Update: Security update for the Linux Kernel (Live Patch 0 for SLE 15 SP2)
Announcement ID: SUSE-SU-2020:3187-1
Rating: important
References: #1175992 #1176072 #1176382
Cross-References:CVE-2020-14386 CVE-2020-24394 CVE-2020-25212
Affected Products:
  • SUSE Linux Enterprise Module for Live Patching 15-SP2

An update that fixes three vulnerabilities is now available.

Description:

This update for the Linux Kernel 5.3.18-22 fixes several issues.
The following security issues were fixed:

  • CVE-2020-25212: A TOCTOU mismatch in the NFS client code could be used by local attackers to corrupt memory or possibly have unspecified other impact because a size check is in fs/nfs/nfs4proc.c instead of fs/nfs/nfs4xdr.c (bsc#1176381).
  • CVE-2020-14386: Fixed a memory corruption which could have lead to an attacker gaining root privileges from unprivileged processes. The highest threat from this vulnerability is to data confidentiality and integrity (bsc#1176069).
  • CVE-2020-24394: The NFS server code can set incorrect permissions on new filesystem objects when the filesystem lacks ACL support. This occurs because the current umask is not considered (bsc#1175518).

Patch Instructions:

To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Alternatively you can run the command listed for your product:

  • SUSE Linux Enterprise Module for Live Patching 15-SP2:
    zypper in -t patch SUSE-SLE-Module-Live-Patching-15-SP2-2020-3187=1

Package List:

  • SUSE Linux Enterprise Module for Live Patching 15-SP2 (ppc64le s390x x86_64):
    • kernel-livepatch-5_3_18-22-default-3-8.2
    • kernel-livepatch-5_3_18-22-default-debuginfo-3-8.2
    • kernel-livepatch-SLE15-SP2_Update_0-debugsource-3-8.2

References: